Spousal household abandonment

My spouse is vacating our household w/clothing, funiture (to include
bedroom), and children to set up a new residence. Once this occurs am I allowed to change the locks to deny spouse the continual unauthorized non-supervised future entry to property. Is this declared household abandonment since she will establish her own residence where I would not have the same access that she will have at current residence. Spouse is on deed only, and has not contributed to any of the monthly mortage payments. Due to my recent military retirement and current job hunting I have been trying to maintain household on my retired military pension, while she has still resided at current resident. During this time spouse has established suffiencent funds to accure her own resident while leaving current resident 1 week away from going to default. I have come up with the funds to stop default, but, if I due this prior to her move, she will not move and stay once again without contributing. Spouse is vacating property due to her adultery affair. So again my question is after spouse vacates can I change the locks? And secondly, is spouse under any legal responsibility to assist with making payment or if residence go into default, held under the same legal obligation and penalty that I am, since she is on the deed?

It is a gray area until you file for divorce.

get him to sign something that he agrees he is leaving and you can change the locks--otherwise he likely can come back if you are still married

This is funny, you automatically assume that it's the wife who the victim is. I am the husband who's wife has had numerous affairs and she has decided to leave. So are you saying, I SHOULD (the husband) have her sign something stating that she has taken up another residence and then change the locks?

yes...I think that is what the poster meant.